CN106740042B - Double-motor assembly device for electric vehicle - Google Patents
Double-motor assembly device for electric vehicle Download PDFInfo
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- CN106740042B CN106740042B CN201710123321.4A CN201710123321A CN106740042B CN 106740042 B CN106740042 B CN 106740042B CN 201710123321 A CN201710123321 A CN 201710123321A CN 106740042 B CN106740042 B CN 106740042B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a double-motor assembly device for an electric vehicle, which comprises an end cover, a first shell, a second shell, a first motor, a first planetary gear mechanism, a clutch, a second motor, a second planetary gear mechanism, a brake and an output shaft. The vehicle engine is connected with a planet carrier of the first planetary gear mechanism, and the first motor is connected with a sun gear of the first planetary gear mechanism; the second motor is connected with a sun gear of the second planetary gear mechanism, a planet carrier of the second planetary gear mechanism is connected with an output shaft, a clutch is arranged between the first motor and the second motor, a brake is fixed on a bottom cover of the first shell, and the coupling or decoupling of power of the engine, the auxiliary motor and the driving motor is realized by controlling the coupling and the decoupling of the clutch and the brake, so that multiple working modes such as pure electric mode, serial mode and hybrid power driving can be realized, meanwhile, the design of a large transmission ratio of the motor is realized, the axial size of the motor is reduced, and the cost is reduced.
Description
Technical Field
The invention belongs to the technical field of driving devices for new energy vehicles, and particularly relates to a double-motor assembly device for an electric vehicle.
Background
At present, the annual output sales of automobiles in China are first in the world, the problems of contradiction between supply and demand of petroleum resources, atmospheric environmental pollution and the like are becoming more and more prominent, and increasingly strict emission regulations and continuously-discharged national encouragement policies promote the market scale of electric automobiles to show explosive growth.
The electric automobile mainly comprises a pure electric automobile, a hybrid electric automobile, a fuel cell automobile and the like. The pure electric automobile converts electric energy into mechanical energy through the driving motor to drive the automobile to run, and the power battery provides electric energy, so that the advantages of zero emission, high efficiency, wide electric energy source and the like become the direction of the vigorous development of all main whole automobile factories. However, the current power battery technology level is limited, and the defects of high price, large volume, short endurance mileage, long charging time, poor low-temperature performance and the like of the current power battery still cannot meet the daily use requirements of users. The fuel cell automobile adopts the hydrogen-oxygen and other mixed fuel cells to provide electric energy, and compared with a pure electric automobile, the fuel cell can supplement fuel, has zero emission, high efficiency and stable operation. However, at present, the fuel cell is still in the technical development and exploration stage, and meanwhile, the problems of the volume, the safety, the hydrogen source and the like of the hydrogen storage device still need to be fundamentally solved.
The hybrid electric vehicle is used as a transition vehicle type before the market of pure electric vehicles and fuel cell vehicles, and can meet emission regulations and user requirements only by integrating the existing engine, motor and battery technologies. Hybrid vehicles typically drive the vehicle from at least two different types of power sources. The hybrid power system consisting of the engine and the single motor has higher requirements on the performance of the motor, larger size and single working mode, and the transmission system needs to be matched to meet the dynamic requirements of the vehicle; the hybrid power system consisting of the engine and a plurality of, in particular two, motors can realize various working modes only by matching the motors with clutches or planetary gears without a complex transmission system. Because the combination modes of the double motors, the clutch and the planetary gear mechanism are different, the prior patent also has some problems, for example, patent document 1 discloses a double-row planetary gear electromechanical power coupling device of a hybrid electric vehicle, the double-row planetary gear mechanism is arranged between the two motors, the power between the planetary gear mechanisms can not be interrupted, the structure directly leads to that the power of the motors can not be completely used for driving the vehicle when the vehicle runs in a pure electric or static starting auxiliary motor and other running modes, and part of the power drives the other planetary gear mechanism to do ineffective running, thereby reducing the energy utilization rate. Patent document 2 discloses a hybrid power transmission system that requires speed regulation of a transmission for engine power due to clutch engagement in a hybrid drive mode state; meanwhile, the clutch is arranged in the planetary gear mechanism (between the sun gear and the planet carrier), so that the assembly precision requirement of the planetary gear mechanism is high; the auxiliary motor is directly connected with the engine, the size is larger, and the problem leads to higher cost and larger size of the mechanism. Patent documents 3 and 4 disclose a driving system of a hybrid vehicle based on planetary gear transmission and a multi-mode coupling power transmission system of an extended range electric vehicle, respectively, whereas in patent documents 3 and 4, an auxiliary motor is arranged at a constant speed with an engine, resulting in a larger size and a higher cost of the auxiliary motor. Patent document 5 discloses a hybrid drive device and a vehicle, which employ a large number of clutches or locking mechanisms to cooperate with planetary gear mechanisms, and which has a complex structure and high assembly requirements. Patent document 6 discloses a hybrid power device with an engine locking mechanism and a driving method thereof, in the patent document, engine power cannot be directly transmitted to a rear-row planetary gear mechanism, and a controller is required to realize coordination management of a front-row planetary gear mechanism, an auxiliary motor and an engine so as to couple energy of three power sources to drive a vehicle, so that the control technology is complex, and the accuracy requirement is high.
[ patent literature ]
1.CN101628541A
2.CN102259580A
3.CN102259582A
4.CN102320238A
5.CN102922981A
6.CN104742730A
Disclosure of Invention
Aiming at the technical problems, the invention provides the double-motor assembly device for the electric vehicle, which can realize the design of a large transmission ratio of a motor, reduce the axial size of the motor and reduce the cost.
An embodiment of the present invention provides a dual motor assembly device for an electric vehicle, including: an end cover, a first housing, a second housing, a first motor, a first planetary gear mechanism, a clutch, a second motor, a second planetary gear mechanism, a brake and an output shaft, wherein one end of the first housing is connected with the end cover, the other end of the first housing is connected with the second housing, the first motor and the first planetary gear mechanism are arranged in a cavity formed by the end cover and the first housing, the second motor and the second planetary gear mechanism are arranged in a cavity formed by the first housing and the second housing, the first planetary gear mechanism is arranged inside a rotor of the first motor, the second planetary gear mechanism is arranged inside a rotor of the second motor, the clutch is arranged between the first motor and the second motor, the first motor and the second motor can be used as a generator or a motor selectively, wherein the first planetary gear mechanism comprises a first planet carrier, a first planet gear, a first sun gear and a first gear, the first ring gear, the first planet carrier and the first sun gear are directly connected with the first motor, the first sun gear and the first ring gear is arranged on the first shaft and the first motor, and the first ring gear is arranged on the first shaft and is fixed on the end cover; the second planetary gear mechanism comprises a second planet carrier, a second planetary gear, a second sun gear and a second gear ring, the second planet carrier is connected with the output shaft, the second sun gear is coaxially arranged with a rotor shaft of the second motor and driven by the rotor shaft to rotate, and the second gear ring is connected with a brake disc of the brake through a key; the brake is fixed on the bottom cover of the first shell, an input shaft of the clutch is connected with the first planet carrier through a spline, and an output shaft of the clutch is connected with the second gear ring through a spline.
Optionally, the first sun gear is integrally formed with the rotor shaft of the first motor, and the second sun gear is integrally formed with the rotor shaft of the second motor.
Optionally, the clutch is a wet clutch, the brake is an electromagnetic brake, and a magnetic yoke assembly of the electromagnetic brake is fixed on a bottom cover of the first shell through bolts.
Optionally, the wet clutch further comprises a sealing disc fixed inside the first shell through bolts, and the wet clutch is arranged in a cavity formed by the sealing disc and the first shell.
Optionally, one end of the first housing is connected to the end cover through a bolt, and the other end of the first housing is connected to the second housing through a bolt.
Optionally, the first gear ring is fixed on the end cover through a bolt, and the second planet carrier is connected with the output shaft through a bolt or welded on the output shaft.
Optionally, the first motor and the second motor are permanent magnet synchronous motors.
Alternatively, when the battery is higher than a predetermined threshold value and the vehicle speed does not exceed a set value, the clutch is disconnected, the brake is engaged, the second ring gear is locked, the second motor is used as a motor, the engine and the first motor do not output power, and the power of the second motor is transmitted to the output shaft through the second planetary gear mechanism; when the battery is smaller than a predetermined threshold value and the vehicle speed does not exceed a set value, the clutch is disconnected, the brake is combined, the first motor is used as a generator, the second motor is used as a motor, the power of the engine is transmitted to the first motor through the first planetary gear mechanism to charge the battery, and the second motor converts the electric energy of the battery into mechanical energy and transmits the mechanical energy to the output shaft through the second planetary gear mechanism.
Alternatively, when the electric vehicle requires high torque or medium and high speed running, the clutch is engaged, the brake is disconnected, the first motor and the second motor are used as motors, and power of the engine and the first motor is transmitted to the second planetary gear mechanism after being regulated by the first planetary gear mechanism so as to be coupled with power of the second motor.
Optionally, during braking of the electric vehicle, generating electricity by braking of the second motor in a state in which a brake is engaged and a clutch is disengaged; in a state where the brake is off and the clutch is on, electricity is generated by the engine brake or by the first motor and the second motor combined brake.
Compared with the prior art, the double-motor assembly device for the electric vehicle integrates and optimizes the double motors, the double planetary gear mechanism, the clutch and the brake, and the rotating speed of the engine crankshaft is improved by the planetary gear mechanism, so that the axial size can be reduced, and the cost is reduced; the most basic planetary gear mechanism is adopted, the structure is simple, and the machining precision is low; the power is coupled through a planetary gear mechanism, so that large transmission ratio, stepless speed change and stable output are realized; the combination and disconnection of the clutch and the brake are controlled, so that multiple working modes of the double-motor system are realized, the control system is simple, and the realizability is high.
Drawings
Fig. 1 is a schematic structural view of a dual motor assembly device for an electric vehicle according to the present invention.
Fig. 2 is an enlarged schematic view of a portion of the first planetary gear mechanism of the present invention.
Fig. 3 is an enlarged schematic view of a portion of a second planetary gear mechanism of the present invention.
(description of the reference numerals)
1-end cap, 2-first housing, 3-second housing, 4-second motor, 5-brake, 501-yoke assembly, 502-brake disk, 6-second planetary gear mechanism, 601-second ring gear, 602-second planet carrier, 603-second planet gear, 604-second sun gear, 7-output shaft, 8-seal disk, 9-first motor, 10-clutch, 11-first planetary gear mechanism, 1101-first ring gear, 1102-first planet carrier, 1103-first planet gear, 1104-first sun gear, 12-end cap bolts, 13-housing bolts, 14-planet carrier bolts, 15-brake bolts, 16-seal disk bolts, 17-ring gear bolts
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
[ technical idea of the invention ]
The invention provides a double-motor assembly device for an electric vehicle, which is composed of two sets of planetary gear mechanisms, a clutch, a brake and two motors, wherein in the assembly device, one motor is used as an auxiliary motor and is mainly used for generating electricity in the running process of an automobile, the other motor is used as a driving motor and is mainly used for providing driving force to drive the vehicle to run, a vehicle engine is connected with a planet carrier of a first set of planetary gear mechanisms, and the auxiliary motor is connected with a sun gear of the set of planetary gear mechanisms; the driving motor is connected with a sun gear of a second set of planetary gear mechanism, and a planet carrier of the set of planetary gear mechanism is integrated with an output shaft of the double-motor assembly device. The clutch is arranged between the two motors, the brake is integrated with the gear ring of the second set of planetary gear mechanism, and the coupling or decoupling of the power of the engine, the auxiliary motor and the driving motor is realized by controlling the combination and disconnection of the clutch and the brake, so that multiple working modes such as pure electric mode, serial mode, hybrid power driving and the like can be realized, meanwhile, the design of the large transmission ratio of the motor is realized, the axial size of the motor is reduced, and the cost is reduced.
Hereinafter, the dual motor assembly device for an electric vehicle according to the present invention will be described in detail with reference to fig. 1 to 3.
As shown in fig. 1, the dual-motor assembly device for an electric vehicle provided by the embodiment of the invention mainly comprises an end cover 1, a first housing 2, a second housing 3, a second motor 4, a brake 5, a second planetary gear mechanism 6, an output shaft 7, a sealing disc 8, a first motor 9, a clutch 10 and a first planetary gear mechanism 11. The brake 5 may be an electromagnetic brake 5 which is simple to control, convenient to arrange and does not need to pay attention to hydraulic oil sealing, the clutch 10 may use a wet clutch 10 capable of transmitting a large torque under the same volume, one end of the first housing 2 may be connected with the end cover 1 through bolts, the other end may be connected with the second housing 3 through bolts, the first motor 9 and the first planetary gear mechanism 11 are arranged in a cavity formed by the end cover 1 and the first housing 2, a sealing member may be used to seal the cavity to form a closed cavity, and the second motor 4 and the second planetary gear mechanism 6 are arranged in a closed cavity formed by the first housing 2 and the second housing 3. The wet clutch 10 is located in a cavity formed by the sealing disc 8 and the first housing 2, which cavity may be sealed using a seal to form a closed cavity, the sealing disc 8 may be fixed inside the first housing 2 by a sealing disc bolt 16, and the wet clutch 10 may be arranged in the closed cavity formed by the sealing disc 8 and the first housing 2. The first planetary gear mechanism 11 is provided inside the rotor of the first motor 9, the second planetary gear mechanism 6 is provided inside the rotor of the second motor 4, and the wet clutch 10 is provided between the first motor 9 and the second motor 4 for outputting power of the engine and the first motor 9 into the second planetary gear mechanism 6. In the present invention, the first motor 9 and the second motor 40 may be permanent magnet synchronous motors with high power density and simple control strategy, but are not limited thereto, and other types of motors may be used.
The first planetary gear mechanism 11 and the second planetary gear mechanism 6 of the present invention may employ existing simple planetary gear mechanisms, and the first planetary gear mechanism 11 may include a first ring gear 1101, a first carrier 1102, a plurality of first planetary gears 1103 and a first sun gear 1104, the plurality of first planetary gears 1103 being supported on a support shaft of the first carrier 1102 and meshing with the first ring gear 1101 and the first sun gear 1104. The second planetary gear mechanism 6 may include a first ring gear 601, a second carrier 602, a plurality of second planetary gears 603, and a second sun gear 604, the plurality of second planetary gears 603 being supported on a support shaft of the second carrier 602 and meshed with the second ring gear 601 and the second sun gear 604. As shown in fig. 2, the first planet carrier 1102 is directly connected with the engine, specifically, the external spline of the first planet carrier 1102 can be meshed with the internal spline of the flywheel of the engine, so as to transmit the power of the engine to the dual-motor driving device; the first sun gear 1104 is coaxially arranged with and rotated by the rotor shaft of the first electric machine 9, and the first ring gear 17 is fixed to the end cover 1, for example, by a ring gear bolt 17. As shown in fig. 3, the output shaft 7 of the second planet carrier 602 may be connected to the output shaft 7 by, for example, a planet carrier bolt 14 or may be directly welded to the output shaft 7 to form an integral structure with the output shaft 7, the second sun gear 604 is coaxially disposed with and rotated by the rotor shaft of the second motor 4, the second ring gear 601 may be connected to the brake disc 502 of the brake by a key, and the type of the key is not particularly limited, and any key capable of ensuring that the brake disc is fixed in the circumferential direction of the shaft constituted by the second ring gear may be used. In a non-limiting example, to make the structural arrangement compact and reduce parts, the first sun gear 1104 may be integrally formed with the rotor shaft of the first motor 9, i.e., the gear as the first sun gear 1104 is integrally formed on the rotor shaft of the first motor 9, and the second sun gear 604 may be integrally formed with the rotor shaft of the second motor 4, i.e., the gear as the second sun gear 604 is integrally formed on the rotor shaft of the second motor 4, but the present invention is not limited thereto, and the first sun gear 1104 and the second sun gear 604 may be fixedly connected to the rotor shaft by a key or the like structure, for example. The input shaft of the wet clutch 10 may be splined to the first carrier 1102, and the output shaft of the wet clutch 10 may be splined to the second ring gear 601 for transmitting or interrupting the power output rearward from the engine and the first motor 9. The yoke assembly 501 of the electromagnetic brake 5 is fixed to the bottom cover of the first housing 2 by a brake bolt 15 for locking or rotating the second ring gear 601. In this way, the first motor, clutch and second motor of the present invention can be coaxially arranged.
The first motor 9 and the second motor 4 in the invention can be selectively used as motors or generators in the electric vehicle, the second motor 4 is mainly used as a motor to provide running power for the vehicle in the running process of the vehicle, the engine and the first motor 9 can be selectively operated according to actual conditions, and the coupling and decoupling of the power of the engine, the first motor and the second motor can be realized by controlling the disconnection and the combination of a clutch, specifically, the double-motor assembly device for the electric vehicle can realize the following working modes according to the working states of the clutch and a brake, including a pure electric starting/running mode, a serial mode, a hybrid mode, a braking mode and the like.
1. Purely electric start/drive mode: when the battery SOC of the electric vehicle is higher than a certain threshold value soc_low and the vehicle speed does not exceed the set value Vm, the wet clutch 10 is disconnected and the electromagnetic brake 5 is engaged, at this time, the second ring gear 601 is locked, the engine and the first motor 9 do not operate, the second motor 4 serves as a motor, and the power obtained by the second motor 4 from the battery is transmitted to the output shaft 7 through the second carrier 602 of the second planetary gear mechanism 6 coupled to the rotor shaft of the second motor 4 to drive the vehicle. The thresholds soc_low and Vm may be specifically set according to the vehicle type and the control strategy.
2. Serial mode: when the battery SOC of the electric vehicle is lower than a certain threshold value soc_low and the vehicle speed does not exceed the set value Vm, the wet clutch 10, the electromagnetic brake 5, and the second motor 4 are in the same state as in the electric-only start/travel mode described above, i.e., the wet clutch 10 is disconnected, the electromagnetic brake 5 is engaged, and the second motor 4 functions as a motor, in which case the first motor 9 functions as a generator for charging the battery. In this way, the power of the engine is transmitted to the first electric machine 9 through the first planetary gear mechanism 11 coupled to the rotor shaft of the first electric machine 9, so that the mechanical energy is converted into electric energy, charging the battery. At the same time, the second electric motor 4 converts the electric energy of the battery into mechanical energy which is transmitted to the output shaft 7 by the second carrier 602 of the second planetary gear mechanism 6 to drive the vehicle.
3. Hybrid mode: when the vehicle needs large torque or medium and high speed running, the wet clutch 10 is combined, the electromagnetic brake 5 is disconnected, at the moment, the first motor 9 and the second motor 4 are both used as motors, the torque output by the engine is directly transmitted to the second planetary gear mechanism 6 after being regulated by the first planet carrier 1102, the power acquired by the first motor 9 from the storage battery is transmitted to the second planetary gear mechanism after being regulated by the first planetary gear mechanism, and thus, the power of the engine, the power of the first motor and the power of the second motor are output by the output shaft after being coupled by the second planetary gear mechanism 6, and the power superposition output of the engine, the first motor 9 and the second motor 4 is realized.
4. Braking mode: according to different requirements of the vehicle on braking capability, various braking modes are realized by controlling the action states of the wet clutch 10 and the electromagnetic brake 5, and braking energy recovery is realized. For example, when the electromagnetic brake 5 is engaged and the wet clutch 10 is disconnected, only the second motor 4 is used as a generator, and braking energy recovery is realized, thereby realizing single-machine braking power generation of the second motor 4; when the electromagnetic brake 5 is disconnected and the wet clutch 10 is engaged, both the first motor 9 and the second motor 4 function as generators, in which case braking can be performed by the engine or braking can be combined by the first motor and the second motor to generate electricity, thereby realizing braking energy recovery.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. A dual motor assembly device for an electric vehicle, comprising: an end cover, a first housing, a second housing, a first motor, a first planetary gear mechanism, a clutch, a second motor, a second planetary gear mechanism, a brake and an output shaft, one end of the first housing is connected with the end cover, the other end is connected with the second housing, the first motor and the first planetary gear mechanism are arranged in a cavity formed by the end cover and the first housing, the second motor and the second planetary gear mechanism are arranged in a cavity formed by the first housing and the second housing, the first planetary gear mechanism is arranged inside a rotor of the first motor, the second planetary gear mechanism is arranged inside a rotor of the second motor, the clutch is arranged between the first motor and the second motor, the first motor and the second motor can be selectively used as a generator or a motor,
the first planetary gear mechanism comprises a first planet carrier, a first planetary gear, a first sun gear and a first gear ring, wherein the first planet carrier is directly connected with the engine, the first sun gear and a rotor shaft of the first motor are coaxially arranged and driven to rotate by the rotor shaft, and the first gear ring is fixed on the end cover;
the second planetary gear mechanism comprises a second planet carrier, a second planetary gear, a second sun gear and a second gear ring, the second planet carrier is connected with the output shaft, the second sun gear is coaxially arranged with a rotor shaft of the second motor and driven by the rotor shaft to rotate, and the second gear ring is connected with a brake disc of the brake through a key;
the brake is fixed on the bottom cover of the first shell, an input shaft of the clutch is connected with the first planet carrier through a spline, and an output shaft of the clutch is connected with the second gear ring through a spline.
2. The electric vehicle dual motor assembly apparatus of claim 1, wherein the first sun gear is integrally formed with a rotor shaft of the first motor and the second sun gear is integrally formed with a rotor shaft of the second motor.
3. The dual motor assembly device for an electric vehicle of claim 1, wherein the clutch is a wet clutch, the brake is an electromagnetic brake, and a yoke assembly of the electromagnetic brake is fixed to a bottom cover of the first housing by a bolt.
4. The two-motor assembly device for an electric vehicle according to claim 3, further comprising a sealing plate fixed inside the first housing by a bolt, the wet clutch being disposed in a cavity formed by the sealing plate and the first housing.
5. The two-motor assembly device for an electric vehicle according to claim 1, wherein one end of the first housing is connected to the end cap by a bolt, and the other end of the first housing is connected to the second housing by a bolt.
6. The electric vehicle dual motor assembly as set forth in claim 1 wherein said first ring gear is bolted to said end cap and said second planet carrier is bolted to or welded to said output shaft.
7. The electric vehicle dual motor assembly apparatus of claim 1, wherein the first motor and the second motor are permanent magnet synchronous motors.
8. The two-motor assembly device for an electric vehicle according to claim 1, wherein when a battery is higher than a predetermined threshold value and a vehicle speed does not exceed a set value, the clutch is off, the brake is engaged, the second ring gear is locked, the second motor serves as a motor, the engine and the first motor do not output power, and the power of the second motor is transmitted to the output shaft through the second planetary gear mechanism;
when the battery is smaller than a predetermined threshold value and the vehicle speed does not exceed a set value, the clutch is disconnected, the brake is combined, the first motor is used as a generator, the second motor is used as a motor, the power of the engine is transmitted to the first motor through the first planetary gear mechanism to charge the battery, and the second motor converts the electric energy of the battery into mechanical energy and transmits the mechanical energy to the output shaft through the second planetary gear mechanism.
9. The two-motor assembly device for an electric vehicle according to claim 1, wherein when the electric vehicle requires a high torque or a medium and high speed running, the clutch is engaged, the brake is disconnected, the first motor and the second motor are used as motors, and power of the engine and the first motor is transmitted to the second planetary gear mechanism to be coupled with power of the second motor after being regulated by the first planetary gear mechanism.
10. The two-motor assembly device for an electric vehicle according to claim 1, wherein during braking of the electric vehicle, power generation is braked by the second motor in a state where a brake is engaged and a clutch is disengaged; in a state where the brake is off and the clutch is on, electricity is generated by the engine brake or by the first motor and the second motor combined brake.
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| CN108482097A (en) * | 2018-05-30 | 2018-09-04 | 厦门金龙联合汽车工业有限公司 | A kind of Automobile hybrid power device and its working method |
| CN111146902A (en) * | 2018-11-03 | 2020-05-12 | 达尼克有限责任公司 | Electromechanical drive device, brake system and battery management system |
| CN110048545B (en) * | 2019-03-26 | 2023-03-31 | 贵州凯因泰科技有限公司 | Gearbox with motor |
| US11040607B2 (en) * | 2019-07-12 | 2021-06-22 | Allison Transmission, Inc. | Multiple motor multiple speed continuous power transmission |
| CN115837834B (en) * | 2022-12-23 | 2024-06-14 | 中国第一汽车股份有限公司 | Driving system and vehicle with same |
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